Prolonged mechanical ventilation is a known risk factor strongly associated with ventilator-associated pneumonia (VAP). As the fatality rates for VAP are high, prevention of VAP has focused on the use of "VAP bundles". Oral decontamination, by reducing the microbial burden within a patient's oral cavity, is an essential part of VAP bundle strategy for reducing VAP rates in mechanically ventilated adults and older children. However there are no published studies of oral care products for VAP prevention in mechanically ventilated neonates. Biotene OralBalance® gel contains antibacterial active ingredients, including lactoperoxidase, lysozyme and lactoferrin,all enzymes with bacteriostatic or bactericidal activity on selective oral microflora. We hypothesize that by directly reducing the oral microbial burden, we indirectly reduce the number of VAP. This will be reflected in the reduced time on mechanical ventilation in the group of infants receiving Biotene OralBalance® gel.